# 4.10: Isosceles Triangles

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**At Grade**Created by: CK-12Estimated9 minsto complete

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**Practice**Isosceles Triangles

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Color | Highlighted Text | Notes | |
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Term | Definition |
---|---|

Base Angles |
The base angles of an isosceles triangle are the angles formed by the base and one leg of the triangle. |

Base Angles Theorem Converse |
The base angles theorem converse states if two angles in a triangle are congruent, then the sides opposite those angles are also congruent. |

Isosceles Triangle Theorem |
The Isosceles Triangle Theorem states that the perpendicular bisector of the base of an isosceles triangle is also the angle bisector of the vertex angle. |

Triangle Sum Theorem |
The Triangle Sum Theorem states that the three interior angles of any triangle add up to 180 degrees. |

Vertical Angles |
Vertical angles are a pair of opposite angles created by intersecting lines. |

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Description

This concept will teach students the properties of isosceles triangles and how to apply them to different types of problems.

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Date Created:

Jul 17, 2012
Last Modified:

Oct 05, 2016
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